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Correlation of plume dynamics and oxygen pressure with VO2 stoichiometry during pulsed laser deposition
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文摘
Vanadium dioxide thin films have been deposited on Corning glass substrates by a KrF laser ablation of V2sub>O5sub> target at the laser fluence of 2?J?cm?. The substrate temperature and the target-substrate distance were set to 500??/sup>C and 4?cm, respectively. X-ray diffraction analysis showed that pure VO2sub> is only obtained at an oxygen pressure range of 4×10?-×10??mbar. A?higher optical switching contrast was obtained for the VO2sub> films deposited at 4×10?-0??mbar. The films properties were correlated to the plume-oxygen gas interaction monitored by fast imaging of the plume.

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